Investigation on the Permafrost Degradation and Carbon Budget in Mongolian Grassland Ecosystems

DOI

10.2991/978-94-6463-278-1_3How to use a DOI?

Keywords

Permafrost degradation; Carbon dynamics; Ground warming; Grassland ecosystems; Climate change impacts

Abstract

Driven by global warming, permafrost degradation has significant implications for the global climate system, especially in its potential to alter the carbon budget and biodiversity of terrestrial ecosystems. This study seeks to clarify the nexus between permafrost degradation and carbon budget dynamics in Mongolian grassland ecosystems. Permafrost degradation was assessed using three primary indicators: mean annual ground temperature (MAGT), active layer thickness (ALT), and depth of zero annual amplitude (DZAA), which were derived from eight boreholes between 2009 and 2020. To deeply analyze carbon fluxes in both permafrost and non-permafrost areas, we considered indicators such as Gross Primary Production (GPP), Ecosystem Respiration (Reco), and Net Ecosystem Exchange (NEE), taken from two monitoring sites from 2016 to 2019. The results indicate that global warming leads to ground warming and changes in soil water content, both of which contribute to permafrost degradation in these ecosystems. Additionally, areas with permafrost mainly function as carbon sinks, while regions without permafrost serve as carbon sources. These dynamics imply that permafrost degradation affects soil water content, which in turn impacts the carbon balance, creating a feedback loop with climate change. This study emphasizes the urgent need for comprehensive climate change mitigation and adaptation strategies to counteract the potential impacts of permafrost degradation on soil moisture and carbon dynamics in grassland ecosystems.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Qinxue Wang
AU  - Tomohiro Okadera
AU  - Tadanobu Nakayama
AU  - Tonghua Wu
AU  - Ochirbat Batkhishig
AU  - Masataka Watanabe
PY  - 2023
DA  - 2023/10/29
TI  - Investigation on the Permafrost Degradation and Carbon Budget in Mongolian Grassland Ecosystems
BT  - Proceedings of the Fourth International Conference on Environmental Science and Technology (EST 2023)
PB  - Atlantis Press
SP  - 17
EP  - 27
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-278-1_3
DO  - 10.2991/978-94-6463-278-1_3
ID  - Wang2023
ER  -